Pressure-control valve



Nov} 5, 1929. I c. .1. ODENDHAL 7 1,734,823

r t PRESSURE CONTROL VALVE Filed Nov. 26, 1927 Inventor c. foamy/ Attorney Patented Nov. 5, 1929 CHARLES J. ODEN'DHAL, F BROOKLINE, MASSACHUSETTS IPRESSURE CONTROL VALVE Application filed November 26, 1927'. Serial No; 235 873;

feed line between thepressure actuated mechanism' and pressuregeneratingdevice I An object of theinvention is to provide a device of this character embodying a bal anced valve responsive tothe variations of thepressure in the feed line whereby to control" communication therebetween under certainpredetermined' conditions and including spring-tension means operati-Ively connectedwith the: valve and' arranged for closing'the SZLIIIGIIPOB; the creation of auni f-orm pressure within the" feed line at each side of the valve.

A1 further; object of the invention is to'provi'de-novelitensionaadjustingtmeans interposedbetween; the valveand the spring; and arranged to' automatically maintain a uniform tensioni uponthe valve by the spring during the'expanding and contracting of the spring caused 'by' the opening and closing of thevalve.

A still further object is to provide means i for manually adjusting the tension of the spring so as to maintain the valve in a proper responsivecondition with respect tothe pressure'of'the fluid.

Another object is to 1 provide an: apparatus of'this'character. of simple and practical construction, which is etficient and reliable in performance, which is devoid of any delicate orsensitive mechanism apt'to easily become out of order, in which the spring tension adjusting mechanism associated with the valve is'disposed'outwardly with respect to the feed line thus permitting of the ready disassembling thereof for replacement of the parts when necessary whichis inexpensive tomanu- 'fa-cture and install in operative position and otherwise well" adapted for the purpose for which the same is intended Other objects andadvant'ages resides in the: 27

special construction and combination of the various elements comprising the invention,

reference being had to the accompanying" drawings forming a part hereof, wherein:

Figure lisa vertical sectional view'through the valveassembly showing the invention adapted foruse as a pressure regulator and:

Figure? is asimilarview with the upper structure broken away and showingthe adaptation of the device for-use as a releasevalver Referring now to the drawing in detail the invention comprises a valve housing indicated' at 5, open at eachend and constituting'intake and discharge ports6 and/Z respectively for the housing. Within: the housing. is a partition 8 closing communication between the intake and discharge ends thereof, said partition having an: opening 9' the edgesof which are formed into a valve seat;

upon which'the valve 10 is operatively arranged.

One side ofthe valve is provided with a valve stem 11 disposed withinthe intake end of the housing with its en'd extendinglatera-11y from. the housing through an opening formed in the upper end plate 12, The I opposite face of the valve 1Ov also carries a stem 13 on the end of which is mountedaz piston 14 operatively positioned with a cylindrical sectionv '15; formed in the housing, thehead of the piston remote from the valve being spacedisubstantia-lly from the lower end plate 12. l-he compartment indicated at l'Z.

thus formed between. the head of they piston and the casing communicates with-the intake end -ofthe housing by" way of; a. pas; sage 18.7 v i a The end: of the stem 11- protrudingfrom. the casing is fitted with a suitable packing nut; 19 7a cap 20 being threadedlyattached to the-outer end of the stem, to which cap is also attached an outwardly extending rod 211 having its f-ree end formed with a. cross head; 22. engaged for limited movement within slotted openings 23 formedin an -pipe 24', said pipe being attached to anupper spring compressing plate 25 having its outer edges formed intoguides 26 sl-idabl-y mounting the guides and plate within a pair of guide: rods .A. lower spring compressor: plate 28 is disposed: between the rods27 having a central opening- 29 permitting free movement with respect to therod. 21, said plate constituting an abutment for theopposite endv of a coil spring 30 pressurably retained therebetween.

c l ar 31 isa a g d on: sachet theguide ing support 3:2 to the inner end of which is the tension of the spring 30.

7 the valve. 7

pivotally mounted a roller bracket 33,-each bracket rotatably supporting upper and lowor rollers 34: and 35 respectively. The upper rollers 34 are arranged in engagement with the under side of the lower plate 28 with the lower rollers 35 engaging the beveled edge 36 of the cap 20.

The upper plate is adjustably retained in posit-ion by reason of its threaded engagement with a screw 37 extending from the upper face of the plate and provided with a pair ofspaced fianges38 engaging the 0pposite surfaces of'a plate 39 secured at the upper end of the guide rods 27. The upper end of the screw 37 carries an adjusting wheel 40 through the manipulation of which the plate 25 may be adjusted whereby to regulate The tension'of the spring may thus be adjusted to enable the same to close the valve when the pressure in the opposite end of the housing is equal and permitting the opening of the-valve upon a Variation in such pressure, the valve thus comprising, in elfect, a balanced valve. Upon a decrease in the pressure in the feed pipe connected with the discharge end of the valve housing 7, the pressure in the opposite end of the feed line will operate to open the valve byreason of the application thereof against the under side of the piston 14, whichrepresents a greater pressure responsive surface than the upper side of the valve because of the area occupied by the stem 11. This diiference in the surface exposed to the pressure between the piston and valve will be sufficient to enable the upward movement of the valve against the tension of the spring 30 and thus permit the pressure to the feed line to be uniformly maintained. As soon as the pressure in the discharge end of the housing 7 reaches a point equal to that in the opposite end of the housing the spring will operate to close After being adjusted to its desired tension, the spring 30 is maintained at a uniform tension with respect to the valve by means of the pivoted roller bracket 33 interposed between the cap 20 and the lower spring plate 28. These brackets 33 are arranged to have their free ends swung upwardly during the upward movement of the valve audit will be apparent that during such swinging movement the spring 30 will be contacted during the initial movement of the bracket into its uppermost position. This increased tension "of the spring however is counteracted by the about by reason of the leverage principle on which the brackets operate, it being well known that a greater force will be required to initially move a member from its position as shown by the brackets 33 in Figure 1, that will be required as the same approaches its upper position. The decrease in such force required to raise the valve will accordingly be offset by the increase in the tension of the spring, thus serving to maintain the balanced relationship between the valve and the spring irrespective of the extent of movement of the valve. The rollers 34 and carried by the bracket provide an anti-friction engagement for the bracket between the cap 20 and plate 28. j p

The valve control mechanism may also be effectively used in connection'with a reducing valve by rearranging the position of the valve in the manner as shown by Figure 2 of the drawings. In such construction'thevalve is balanced as heretofore describedatlhough the valve is disposed operatively in feeding position from the arrangement shown in Figure 1.

r This construction forthe reducing valve provides for the entrance of the fluid under pressure at the intake end ll of the housing and for discharge therefrom through the opening'4c2 at the opposite side thereof asshown by the arrows. The valve is normally held open by the action of the spring and as the pressure in the feed pipe communicating with the discharge end 42 approaches that desired, the valve will gradually close.

The purpose of the reducing valve is to provide means enabling a reduced pressure to be maintained in the feed line connected with the discharge end 42 of the housing and.

intake end 4:1. On the other hand the opposite faces of the piston and valve present a diiferent area, due to the area occupied by the stem 11 extending from the upper sur- ;face of the valve and because of this fact, as

soon as the pressure in the discharge end 42 reaches an amount suiiicient to ofi'set the tension of the spring, the valve accordingly will be closed. 7

While the invention is adapted primarily for use in connection with said steam feed line, it is to be understood that the device is equally well adapted for use in connection with other fluid pressure pipe line, such as water, gas or other fluid. a

It is apparent that since the pressure necessary to close the valve is regulated by the size or diameter of the valve stem the relative diiference in the pressure at the opposite end of the housing will thus be governed by the size at which the stem is constructed.

It is obvious that the invention is susceptible of various changes and modifications, without departing from the spirit or scope of the invention or sacrificing any of its advantages, and I accordingly claim all such forms of the device to which I am entitled.

Having thus described my invention, what I claim as new is:

1. In a pressure control valve, spring actuating means for the valve adapted to permit opening thereof under certain predetermined pressure condition and including tensioncompensatmg means for the spring lnterposed between the spring and the valve comprising a pair of pivotally mounted roller brackets having their free ends arranged for maintaining the adjacent ends of the spring and valve in spaced relation and adapted upon their upward swinging movement to increase the tension of the spring without subjecting the valve to such increased tension.

2. In a pressure control valve, spring actuating means for the valve adapted to permit opening thereof under certain predetermined pressure condition and including tension compensating means for the spring interposed between the spring and the valve comprising a pair of pivot-ally mounted roller brackets having their free ends arranged for maintaining the adjacent ends of the spring and valve in spaced relation and adapted to transmit movement of the valve to the spring for expanding and contracting said spring, the

initial upward swinging movement of the bracket for contracting the spring serving to increase the tension of the same, said spring being unaffected by a continuous upward movement of the bracket whereby to limit the increase in the tension of the spring during 7 the opening of the valve.

In testimony whereof I aflix my signature.

CHARLES J. ODENDHAL. 

